Ah that makes sense now, it’s handy for the 0v & 5v if nothing else. I just need to brush up on my C coding and get more info on the Arduino platform (been working in Swift on the iPad for the last couple of years).
The NS1 sounds great with the Werkstatt, that creamy ladder filter on the Moog really takes the sound up a notch (I find the NS1 filter a bit too shrill when it goes into feedback). I actually bought the NS1 as an upgrade to the Werkstatt to add a lot of extra functionality that Moog left out of their synth (S&H, Noise, more waveforms, clock dividers, multis, mixers etc).
Interfacing is easy because the Werkstatt works well on 5v inputs anyway, and has that header based patchbay like the NS1. The main thing is to feed the NS1 oscillator directly into the Moog VCF in, otherwise you get a lot of distortion.
I also have a Dreadbox Erebus which works nicely with the Moog and NS1 with the right cables.